Mesothelioma is an aggressive and deadly form of cancer. Mesothelioma treatments are available, but for many people with mesothelioma, a cure is not possible.

Signs and symptoms of mesothelioma vary depending on where the cancer occurs.


Pleural mesothelioma, which affects the tissue that surrounds the lungs, causes signs and symptoms that may include:

  • Chest pain under the rib cage
  • Painful coughing
  • Shortness of breath
  • Unusual lumps of tissue under the skin on your chest
  • Unexplained weight loss

Peritoneal mesothelioma, which occurs in tissue in the abdomen, causes signs and symptoms that may include:


  • Abdominal pain
  • Abdominal swelling
  • Lumps of tissue in the abdomen
  • Unexplained weight loss
  • Other forms of mesothelioma

Signs and symptoms of other types of mesothelioma are unclear, since these forms of the disease are very rare.

Pericardial mesothelioma, which affects tissue that surrounds the heart, can cause signs and symptoms such as breathing difficulty and chest pains.

Mesothelioma of tunica vaginalis, which affects tissue surrounding the testicles, may be first detected as swelling or a mass on a testicle.

Causes

In general, cancer begins when a series of genetic mutations occur within a cell, causing the cell to grow and multiply out of control.

It isn't clear what causes the initial genetic mutations that lead to mesothelioma, though researchers have identified factors that may increase the risk. 

It's likely that cancers form because of an interaction between many factors, such as inherited conditions, your environment, your health conditions and your lifestyle choices.